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Climate Change

An Introduction to Sustainable Development Goal 13: Climate Action

How do we know that the climate is changing, and what are the possible responses to climate change? Sustainable Development Goal 13, Climate Action, explores these questions and how to solve them.

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0:06 my name is maria camilamus 0:08 and i'm a professor at the school for 0:10 environment and sustainability 0:12 at the university of michigan in the 0:13 united states 0:15 i'm from brazil and i do research and 0:18 teach 0:18 about climate adaptation especially in 0:21 lower income countries 0:23 in this segment we're going to talk 0:24 about sustainable 0:26 development goal number 13 climate 0:28 action 0:29 as you can see in this slide the goals 0:31 for sd 0:32 13 are very ambitious and they include 0:35 strengthening resilience 0:36 and adaptive capacity to climate related 0:39 hazards 0:39 and integrating climate change measures 0:42 into natural policies 0:44 however progress has been 0:47 not as fast as we would have 0:50 desired as of 2018 the formal parts 0:54 of the targets especially in the 0:56 adherence of parties 0:58 to the formal paris agreement have been 1:01 developing 1:02 but other parts of the goals is lower to 1:05 develop 1:06 especially the idea that we have to 1:09 fastly 1:10 increase adaptive capacity we know that 1:12 climate change 1:14 is a global problem that can bring 1:16 danger 1:17 to many of the things that we care about 1:19 including 1:20 livelihoods ecosystems and the built 1:23 environment 1:24 in this slide there are some numbers 1:27 that 1:27 tell us about the depth and the breadth 1:31 of climate change as a problem and i 1:33 encourage you to look 1:34 at some of the consequences that are 1:37 projected 1:38 and what climate change is already 1:40 costing to many low-income communities 1:42 around the world 1:43 how do we know that the climate is 1:45 changing by living in these words we can 1:48 notice for instance that we are 1:49 experiencing more flooding 1:51 more droughts that the weather is 1:53 getting crazier 1:55 by the minute and that the effects of 1:58 those things are becoming 1:59 more costly both in terms of lives as 2:02 well as in terms of 2:03 money the impacts of climate change 2:07 are varied and they will affect 2:10 different systems differently as well 2:12 but the most expected changes that are 2:15 projected for our future 2:17 are in terms of changes in precipitation 2:20 or the amount that is raining 2:21 and changes in temperature those changes 2:24 will likely 2:26 increase impacts on ecosystems on people 2:30 and on the build environment in the form 2:33 of drought 2:34 of flooding storms as well as 2:38 sea level rise the way that those 2:40 impacts are distributed in the world 2:43 vary uh considerably and if you guys are 2:46 interested in the science of climate 2:48 change 2:49 and how it actually those projections 2:51 are made 2:52 there is a link for a video that we are 2:55 going to watch 2:56 talking about climate modeling and how 2:59 impacts 3:00 are being projected from the science of 3:03 climate change 3:04 as we have learned from the video there 3:07 is a lot of things that are still 3:09 uh to be learned about how those impacts 3:12 are gonna 3:13 affect the things that we care about 3:17 overall there are three kinds of 3:19 responses that you can have to climate 3:21 change 3:22 you can mitigate it which means that you 3:24 will work 3:25 very hard to decrease the emissions that 3:27 are causing global warming 3:30 and causing the problem of climate 3:31 change and its impact 3:33 or we can adapt when things have changed 3:37 already to a level 3:38 that we cannot do the same things that 3:40 we do today 3:41 to respond to those negative impacts 3:46 the third thing that we can do is not do 3:49 anything an inaction in itself is a 3:52 response 3:52 that might exacerbate a lot of the 3:55 problems that we are having right now 3:57 so examples of mitigation are for 4:00 example 4:01 relying on the cleaner energy matrix 4:04 using more renewables such as wind 4:06 energy or solar energy 4:09 driving more economic cars or 4:12 using less electricity or doing anything 4:15 that we can 4:16 to decrease the level of emissions of 4:20 greenhouse gases and especially 4:22 carbon dioxide things that we do to 4:25 adapt 4:26 can be making strides in understanding 4:30 where the risks of climate change are 4:32 and for instance building barriers for 4:36 water rice or flooding or we can 4:39 actually increase the level of 4:40 irrigation that we use in agriculture 4:43 or we can be very proactive 4:47 on enacting policies and interventions 4:50 to make people safer 4:52 from extreme events such as storms are 4:55 flooding 4:56 but there is a series of actions that 4:58 are good for both 5:00 we call those actions co-benefits 5:02 because they are good both for 5:04 adaptation and mitigation 5:06 examples of co-benefits 5:09 are for instance education building 5:12 green infra 5:12 infrastructure urban forest conserving 5:15 water 5:16 uh eating more local food all of those 5:19 things are both good for mitigation 5:21 because they decrease the level of 5:23 emissions but they're also good for 5:25 adaptation 5:26 because they allow us to build a more 5:29 sustainable world where 5:30 those impacts will be slowed down or 5:33 even 5:34 overcome with new policies and new 5:37 interventions 5:40 so here are some examples of what we 5:43 were talking about 5:44 so we see all the time around us how 5:47 those things are becoming more and more 5:49 common 5:49 and how it's they are also becoming more 5:52 difficult to deal with to respond but 5:55 especially to recover from 5:58 so examples of extreme events include 6:00 for instance flooding 6:01 we hear about flooding all the time and 6:04 how the long-term 6:05 impacts of flooding are becoming 6:07 recurrent on some 6:08 areas where the number of events has 6:11 increased significantly 6:13 and the time between each event is 6:15 becoming shorter 6:16 and harder to recover from and this is 6:20 especially the case uh in delta 6:22 countries such as bangladesh 6:24 and large coastal cities in lower income 6:27 countries 6:27 such as lagos and nigeria other kinds of 6:30 events are also becoming more frequent 6:33 another example is for instance drought 6:35 who actually kills 6:37 the most people of all extreme events 6:39 but because it happens 6:41 very slowly and mostly through famine 6:43 people pay 6:44 less attention than they would for what 6:46 we call 6:47 rapid onset events like hurricanes 6:50 or very extreme storms but drought has 6:54 been plaguing some regions of the world 6:56 for generations 6:57 and the projections of climate modeling 7:01 is that they are going to become more 7:02 severe 7:03 and maybe last longer 7:06 examples of very long-lasting droughts 7:09 are the 1983 el nino related drought 7:12 in sub-saharan africa which lasted for 7:15 over 20 years 7:16 and some people estimate actually killed 7:19 more than 20 million people in 7:21 sub-saharan africa 7:22 other events are becoming are newer in 7:25 the sense that we haven't experienced 7:27 them before 7:29 such as sea level rise so coastal areas 7:32 coastal cities but especially 7:34 in small island states many of them 7:36 low-income countries 7:38 are going to be very exposed and very 7:42 impacted by sea level rise the pictures 7:44 here 7:45 are actually um 7:48 are actually an attempt of the 7:50 government of the maldives 7:52 to call attention to the plight of small 7:54 island states 7:55 so in 2009 the whole cabinet of the 7:58 maldives actually met 8:00 on the water to call the world's 8:02 attention 8:03 to how urgent and how severe sea level 8:06 rise may be for the island 8:09 they also commissioned a study for 8:12 a potential futuristic 8:15 incarnation of what islands will become 8:17 a floating island 8:19 but all of those things are complicated 8:22 by the issue that the resources 8:24 are not being made available for any 8:27 uh of the responses that those small 8:30 island states need to be preparing for 8:33 what can we do 8:35 so there are many things that we can do 8:36 as individuals there are many things 8:38 that we can do as communities 8:40 but climate change is a global problem 8:42 mitigating climate change 8:44 will have to be done at the global level 8:48 climate change is an equal opportunity 8:50 problem because 8:53 co2 and other greenhouse gases they mix 8:56 equally in the atmosphere so everybody 8:58 is going to be 8:59 affected by climate change however 9:02 people are going to be affected by it 9:04 very differently 9:05 because one of the biggest determinants 9:07 of how you're going to be affected by 9:09 climate change 9:10 is what assets and what resources you 9:13 have 9:13 both to respond to adapt and to recover 9:16 from climate change 9:17 on the ground so while climate change 9:20 and mitigation is a global 9:22 problem adaptation is a local problem 9:25 what can we do well one of the things 9:28 that distinguished climate change from 9:29 other environmental problems 9:31 is that developing countries or lower 9:34 income countries are already being 9:36 disproportionately affected 9:38 by climate change so this is a huge 9:40 justice 9:41 and fairness problem an example here is 9:44 that the share of people affected by 9:46 climate change 9:48 driven by disasters is increasing and is 9:50 this is increasing 9:52 very disproportionately across the level 9:54 of income of different countries 9:57 while low income countries are affected 10:00 much more severely in terms of laws of 10:03 life for instance 10:04 high income countries are affected but 10:07 many fewer people die on those countries 10:09 although they are much more expensive 10:11 financially because of the laws of 10:13 infrastructure 10:14 and how much it costs for you to rebuild 10:17 what 10:18 was already there 10:21 this suggests that you know there is an 10:23 intrinsic unfairness about the 10:25 distribution 10:26 of cause and effect of climate change 10:29 so if we look at the contribution of 10:31 different countries to climate change 10:33 what we find 10:34 is that high income countries have 10:37 contributed historically much more to 10:40 climate change 10:41 while low to middle income income 10:44 countries and low 10:45 income countries have contribute much 10:48 less to climate change 10:49 both per capita and many times as well 10:52 uh in absolute numbers in order to 10:55 rebalance the equation between who's 10:58 causing climate change and who is going 11:00 to be affected by climate change 11:02 all countries need to work together act 11:04 together 11:05 to a system that will be more fair and 11:08 actually more effective 11:09 in terms of recovering and adapting to 11:12 climate change 11:14 so some of the things that countries can 11:15 do is that they 11:17 for instance develop countries who have 11:19 already contributed 11:21 massively to global warming 11:24 can adopt technologies and 11:28 incentivize technology or create demand 11:30 for low-carbon technologies 11:33 that will free some space in the 11:35 atmospheric commons 11:36 because lower income countries and mid 11:40 middle to low-income countries will need 11:42 that space 11:43 if they want to increase the consumption 11:46 of energy by their citizens by their 11:50 countries in general 11:52 so if it's a zero-sum game somebody will 11:55 have to clean up 11:56 so that other people can actually uh 11:59 benefit 11:59 uh from this newer technology but also 12:03 to provide access to energy 12:06 for large swathes of their population 12:08 that don't have it right now 12:11 if we notice the comparison on these 12:13 charts about current 12:15 and future consumption of energy we 12:18 notice 12:18 that while at this point the per capita 12:21 consumption 12:22 of lower and middle income countries 12:25 is much lower than high income countries 12:29 this is likely to change in the future 12:31 as more and more people have access to 12:33 energy 12:34 so we have to think very carefully about 12:38 how to make future policies cleaner 12:41 but also more fair in terms of access 12:45 to energy and the possibility 12:48 of improve your livelihood as a function 12:52 of this access although we have to act 12:54 together we have to act 12:56 differently as we discussed and one way 12:59 in which we have to act as 13:01 act differently is that high income 13:03 countries should be 13:04 invested much more aggressively in 13:06 energy research and development 13:09 but what we see in this graph is 13:11 actually there has been 13:13 a big drop in overall investment 13:16 although 13:16 in more recent years the investment in 13:19 areas that 13:20 are very desirable for instance such as 13:22 renewables 13:23 have increasing relatively uh to the 13:25 past 13:26 but in order to be able to afford 13:29 this transformation this access to 13:32 energy and access 13:34 to electricity transformation to happen 13:37 we have to be much more aggressive on 13:39 the way that we invest in new 13:40 technologies and create 13:42 demand for low carbon technologies 13:45 we also have to act differently and 13:47 understanding where 13:48 the impact of climate change is going to 13:51 be 13:52 most severe and what are the means that 13:55 we have to combat that 13:57 another example where there is a big 13:59 level of inequality 14:01 globally is the amount of climate 14:03 information 14:04 that we have in different areas of the 14:06 world 14:07 if you look at this map you see that 14:10 developed countries 14:11 high income countries are much more well 14:15 served by data collection 14:17 across the globe in terms of both 14:20 weather 14:20 and climate information and it is 14:22 necessary that 14:24 we improve data collection especially in 14:26 areas that are going to be particularly 14:29 affected by climate change impact 14:33 another way that we have to act 14:34 differently is understanding 14:36 how future production of food can become 14:39 more sustainable and better distributed 14:41 across the globe 14:42 many of the food producing areas in the 14:45 world today are going to become 14:47 more and more reliant on irrigation and 14:50 if projections of climate impact 14:52 are true and temperatures go up many of 14:55 those 14:56 areas will tend to increase 15:00 the need for irrigation while actually 15:02 the availability of water 15:04 may be decreasing so we need to figure 15:07 out a better way to produce food 15:09 sustainably 15:10 and and also to create 15:13 organizations and institutions that 15:15 allow for the distribution of this food 15:17 where it's most needed around the globe 15:20 one way that we can do that 15:22 is to think very hard which are pathways 15:25 that would lead us to this world that is 15:27 more resilient 15:28 there is a more fair word in terms of 15:30 the distributions of 15:31 impacts and benefits as well as 15:35 responses and adaptations to climate 15:37 change 15:38 an idea that has emerged strongly for 15:41 the past 10 years 15:42 is this concept of climate-resilient 15:44 pathways 15:45 so climate-resilient pathways they 15:47 combine 15:49 the two actions that we talked about 15:51 mitigation and adaptation but they think 15:54 of those two actions in the context of 15:56 sustainable development 15:58 so on top of everything that we have to 16:01 do 16:02 in order to develop sustainability we 16:05 should think 16:05 of every action that we take how they 16:08 are going to 16:09 be impacted or impact mitigation and 16:12 adaptation 16:13 and vice versa every time we mitigate 16:15 every time we adapt or we put 16:18 in place the interventions to mitigate 16:21 and to adapt 16:22 we have to think about how they're going 16:23 to affect our ability to develop 16:25 sustainability 16:26 so we talked a little bit about that 16:28 before when we were discussing the 16:30 energy transformation and how you know 16:33 as more people have access to clean 16:36 energy 16:37 how this transformation could bypass 16:39 many of the bad things that we have done 16:41 in the past that have 16:42 led to the problem of global warming so 16:45 climate resilient pathways have to think 16:47 about those three things in the same 16:50 breath they have to think of these three 16:52 things 16:53 as aspirations we have to mitigate we 16:55 have to adapt 16:56 and we have to develop sustainability 16:59 and 17:00 this picture suggests that some of the 17:02 ways that we do 17:03 that or if we consider for instance the 17:05 sdgs how we can 17:07 take into account in each one of those 17:09 sdgs what could be potential impacts of 17:12 climate change 17:13 and work either to mitigate or to adapt 17:15 to them in a sustainability way 17:18 that we would go a long way to think 17:20 about a future 17:21 that can be possible even if we are 17:24 under the threat 17:25 of very um severe change and a lot of it 17:28 negative negative to livelihoods and 17:32 ecosystems 17:33 recently the intergovernmental panel on 17:35 climate change the ipcc 17:37 released a report that makes a very 17:39 strong argument 17:41 that a safe space for humanity is to 17:43 stay 17:44 within 1.5 degrees celsius warming 17:48 but climate resilient pathways are a 17:50 process and in that process 17:51 as we talked before we have to act 17:53 together we have to 17:55 act now and we have to act differently 17:59 so as many things that we have done 18:01 before and will have to do in the future 18:04 a lot of the ideas that we have on how 18:07 to build those climate resilient 18:08 pathways 18:09 may seem at this point a little bit 18:12 aspirational given 18:13 the little progress that we have done so 18:15 far to actually mitigate climate change 18:18 okay however we need also to take these 18:21 aspirations 18:22 seriously especially if we want to keep 18:26 thinking of a future that is possible 18:28 and is actually 18:35 better