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The last five years on Earth have been hotter than at any time since the industrial revolution kicked off almost two centuries ago.

That’s the conclusion of Europe’s Copernicus Climate Change Service, which published data on Wednesday showing that global average temperatures since 2015 were some 1.2 degrees Celsius (2.2 degrees Fahrenheit) higher than when steam engines began powering industry. Last year was the second warmest on record after 2016.

2019 was Europe’s warmest year, marginally higher than temperatures in 2014, 2015 and 2018. Global average temperatures in 2019 were 0.6 degrees Celsius warmer than the 1981 to 2010 average. Atmospheric carbon dioxide concentration increased by about 2.3 parts per million in 2019, to the second-highest level on record.

It was 116 degrees Fahrenheit in the shade outside the new Al Janoub soccer stadium, and the air felt to air-conditioning expert Saud Ghani as if God had pointed “a giant hair dryer” at Qatar. Yet inside the open-air stadium, a cool breeze was blowing. Beneath each of the 40,000 seats, small grates adorned with Arabic-style patterns were pushing out cool air at ankle level. And since cool air sinks, waves of it rolled gently down to the grassy playing field. Vents the size of soccer balls fed more cold air onto the field. Ghani, an engineering professor at Qatar University, designed the system at Al Janoub, one of eight stadiums that the tiny but fabulously rich Qatar must get in shape for the 2022 World Cup. His breakthrough realization was that he had to cool only people, not the upper reaches of the stadium — a graceful structure designed by the famed Zaha Hadid Architects and inspired by traditional boats known as dhows. “I don’t need to cool the birds,” Ghani said.

Qatar, the world’s leading exporter of liquefied natural gas, may be able to cool its stadiums, but it cannot cool the entire country. Fears that the hundreds of thousands of soccer fans might wilt or even die while shuttling between stadiums and metros and hotels in the unforgiving summer heat prompted the decision to delay the World Cup by five months. It is now scheduled for November, during Qatar’s milder winter. The change in the World Cup date is a symptom of a larger problem — climate change. Already one of the hottest places on Earth, Qatar has seen average temperatures rise more than 2 degrees Celsius (3.6 F) above preindustrial times, the current international goal for limiting the damage of global warming. The 2015 Paris climate summit said it would be better to keep temperatures “well below” that, ideally to no more than 1.5 degrees Celsius (2.7 F).

[…] To survive the summer heat, Qatar not only air-conditions its soccer stadiums, but also the outdoors — in markets, along sidewalks, even at outdoor malls so people can window shop with a cool breeze. “If you turn off air conditioners, it will be unbearable. You cannot function effectively,” says Yousef al-Horr, founder of the Gulf Organization for Research and Development. Yet outdoor air conditioning is part of a vicious cycle. Carbon emissions create global warming, which creates the desire for air conditioning, which creates the need for burning fuels that emit more carbon dioxide. In Qatar, total cooling capacity is expected to nearly double from 2016 to 2030, according to the International District Cooling & Heating Conference. And it’s going to get hotter.

It is well-established established that Bitcoin mining — aka, donating one’s computing power to keep a cryptocurrency network up and running in exchange for a chance to win some free crypto — uses a lot of electricity. Companies involved in large-scale mining operations know that this is a problem, and they’ve tried to employ various solutions for making the process more energy efficient.

But, according to testimony provided by Princeton computer scientist Arvind Narayanan to the Senate Committee on Energy and Natural Resources, no matter what you do to make cryptocurrency mining harware greener, it’s a drop in the bucket compared to the overall network’s flabbergasting energy consumption. Instead, Narayanan told the committee, the only thing that really determines how much energy Bitcoin uses is its price. “If the price of a cryptocurrency goes up, more energy will be used in mining it; if it goes down, less energy will be used,” he told the committee. “Little else matters. In particular, the increasing energy efficiency of mining hardware has essentially no impact on energy consumption.”

In his testimony, Narayanan estimates that Bitcoin mining now uses about five gigawatts of electricity per day (in May, estimates of Bitcoin power consumption were about half of that). He adds that when you’ve got a computer racing with all its might to earn a free Bitcoin, it’s going to be running hot as hell, which means you’re probably using even more electricity to keep the computer cool so it doesn’t die and/or burn down your entire mining center, which probably makes the overall cost associated with mining even higher.

This summer people have been suffering and dying because of heat waves and wildfires in many parts of the world. The past three years were the warmest ever recorded, and 2018 is likely to follow suit. What we do in the next 10-20 years will determine whether our planet remains hospitable to human life or slides down an irreversible path to what scientists in a major new study call “Hothouse Earth” conditions.

Amazon has changed the way Americans shop. This year, the e-commerce giant said its annual Prime Day sale was “the biggest shopping event in Amazon history.” During the 36-hour event, people bought over 100 million products, crashed the website, and signed up for more Prime memberships than ever before. The behavior is indicative of the buying culture Amazon created. The company’s ease, speed, and savings — underscored by killer perks like free, expedited shipping and simple returns — has encouraged more people to shop online, more often.

But these free benefits come with a hidden environmental cost that doesn’t show up on the checkout page, experts say. Expedited shipping means your packages may not be as consolidated as they could be, leading to more cars and trucks required to deliver them, and an increase in packaging waste, which researchers have found is adding more congestion to our cities, pollutants to our air, and cardboard to our landfills.

“People are consuming more. There’s more demand created by the availability of these cheap products and cheap delivery options.”