The satellite helping slow climate change — right now

Millie Chu Baird |  Apr 2024

2024년 7월 29일 shadowing 완료

 

https://youtu.be/Fjbz-Rzmzxw?si=j74t-zj9WXBBYfN9

 

 

 

TED Talker/연자

Millie Chu Baird

Vice President in EDF's Office of the Chief Scientist

Environmental advocate

Lots of people are really enthusiastic about space. My husband, my daughters and a lot of my colleagues love rockets and pretty much anything that has to do with space. It's never really been my thing. However, I recently went to a rocket launch, and I can honestly say that I got emotional. And the emotion that I felt wasn't just thrill or awe. It was hope. Because my colleagues and I helped put something on that rocket that will address the single most important thing we can do to affect climate change in our lifetimes. 

We often hear about things we can do to help our grandchildren and the Earth that they'll inherit. And everything we're doing to reduce carbon dioxide will certainly help in the long run. But what if we could do something that would help people's lives now? I believe we can, because we're taking on methane. Methane is a highly potent short-term greenhouse gas. Let's compare this year's carbon dioxide pollution from burning fossil fuels with this year's methane pollution. There is a lot more CO2. However, because methane is over 80 times as powerful at trapping heat in the short term, methane will cause as much warming as all that CO2. And methane is easier to control if we know where it's coming from.

So what was on that rocket that makes me so hopeful? This is MethaneSAT. It's one of thousands of active satellites orbiting the Earth. But it's my favorite. Not just because we helped put it there, but because we designed it for a purpose to have a profound impact on methane. And soon.

For the past 20 years, my job has been to understand climate from a variety of angles, to be a bridge between scientists, policymakers and companies, ensuring that we're all working towards the same big vision. And the vision for MethaneSAT is to deliver actionable data quickly, putting it in the hands of people in the trenches pushing for change.

Now methane comes from several sources. It comes from cows, it comes from landfills, it comes from coal mines. And a lot of it comes from leaks from the oil and gas infrastructure. For a while, we've known what the overall concentration of methane is in the atmosphere, but we haven't been able to pinpoint sources and tell how much was coming from where. In fact, companies and governments often underreport their emissions because they simply haven't had good data. But now they will. When we looked at the data we were collecting using airplanes, we realized that we would never get a comprehensive enough view. We simply cannot fly an airplane over every oil and gas field in the world every day. We realized that we needed to be collecting our data using a satellite. And that satellite would need spectrometers that did not yet exist. So we went to the world's most innovative instrument experts, and they helped us build two spectrometers that would allow us to see methane emissions from 590 kilometers away, from space. They had to develop a new manufacturing technique to create a prism that would allow us to see how even the smallest concentrations of methane interact with light. It's pretty amazing.

To give you a sense of the power of MethaneSAT, I'd like to show you some images that will show how we'll see methane from oil and gas. We'll be able to zoom in and out and circle back weekly to see how emissions have changed. MethaneSAT will show the total picture, not just point sources or large leaks, but also the smaller, more spread-out sources that actually make up the majority of emissions most of the time. MethaneSAT will show how much methane is coming from where over time.

Now you're the first to see this data. It's raw data that came from the satellite. It's spectral imagery. But after we do our analysis on it, we still have to solve a people challenge and change human behavior. So we'll put our analysis directly in the hands of those who can take action to reduce methane from oil and gas. That would be government regulators, the companies themselves and nonprofits who will be receiving our data at no cost.

Fixing leaks is actually not a technical challenge. Often it's as easy as fixing a crack in a pipe. Companies know how to do this. It's just a matter of priority. And that's what I mean by a people challenge. Environmental Defense Fund is taking this on. As the first environmental nonprofit to own and operate a satellite, we are supporting both the technology and the advocacy. MethaneSAT would not exist without generous donors, some of whom are a part of this TED community. We'd like to thank you for your belief in our mission. We'd also like to thank government entities like the New Zealand Space Agency, who have invested in MethaneSAT to build their space capacity, but also to better understand methane emissions from agriculture.

With powerful data and boots on the ground, our goal is to reduce methane emissions from oil and gas facilities by 75 percent in the next six years. That's 75 percent. It's a lot, and we have momentum. Fifty companies representing 40 percent of global oil and gas production have already pledged to cut their methane emissions by 90 percent by 2030. 

Over 150 countries have signed the Global Methane Pledge to be a part of the solution. Purchasers can also influence sellers. The largest importer of natural gas in the world, the European Union, is already taking steps to extend its rules to apply to imports and setting in place rules that will allow them to buy from suppliers that have the least methane emissions. And MethaneSAT will help track all of that.

It's powerful when countries and companies have this knowledge, but it's even more powerful when we all have the knowledge, because it provides the information and the incentive for people to fulfill their commitments. This kind of radical transparency changes the dynamic. It's what makes me hopeful, and I hope you share that feeling as well.

With MethaneSAT in space and the power of people on Earth, let's do everything we can as quickly as we can to slow the rate of global warming in our lifetimes. Thank you.

 

Words&phrases/어휘공부