While riding hard on a bike, do you feel like you are saving the planet? Or do you just feel out of breath? In fact, cycling is now considered one of the best weapons mankind can use in the fight against climate change.

The United Nations General Assembly passed a resolution (决议) in March supporting bicycles as a tool for dealing with climate change. The resolution calls on member states to “add the bicycle to public transportation, in the city and countryside, in developing and developed countries”, with all 193 members of the UN agreeing upon the resolution.

The decision has received positive comments from different groups in support of cycling and the environmental awareness internationally. “It’s an important step toward the recognition of cycling as an important means of transport,” said the European Cyclists Federation.

The resolution from the UN comes at a time when climate change has returned to the center of the world’s attention. On February 28, the UN published a new report assessing (评估) recent climate change trends (趋势). The report warns that the world’s average temperature will rise by 1.5 C above pre-industrial levels (1850-1900), with more than 40% of the world’s population being “easily affected” to these temperature changes.

Cycling is an environmentally friendly means of transport. Choosing to take a bike instead of a car just once a day can reduce a person’s carbon emission (碳排放) from transport by 67 percent, according to a research by the University of Oxford. The research also found that cyclists produced 84 percent lower CO 2 emissions from all daily travel than non-cyclists.

Cycling has grown in popularity as people who take public transport to work wish to stay away from crowded public transport and also like taking any opportunity to exercise. Cycling culture has been further encouraged with the influence of COVID-19. In May 2020, bike sales in Spain increased 22 times compared with 2019. In London, large parts of the city are being closed off to cars so that people can walk and cycle safely.

More importantly, the resolution focuses on bike-sharing services, which could be seen as recognition of China’s bike-sharing success, noted CGTN. China has some of the largest bike-sharing systems in the world. This means of transport that produces zero emissions reduces the amount of CO2 sent out into the atmosphere (大气层) by 4.8 million tons every year, according to a 2020 report from the World Resources Institute.

You might think that “global warming” means nothing more than a rise in the world’s temperature. But, rising sea levels caused by it have resulted in the first evacuation(撤离) of an island nation—the citizens of Tuvalu will have to have their homeland.

During the 20th century, sea level rose 8-12 inches. As a result, Tuvalu has experienced lowland flooding of salt water which has polluted the country’s drinking water.

Paani Laupepa, a Tuvaluan government official, reported to the Earth Policy Institute that the nation suffered an unusually high number of fierce storms in the past ten years. Many scientists connect higher surface water temperatures resulting from global warming to greater and more damaging storms.

Laupepa expressed dissatisfaction with the United States for refusing to sign the Kyoto Protocol, an international agreement calling for industrialized nations to reduce their greenhouse gas emissions(导致温室效应的气体排放), which are a main cause of global warming. “By refusing to sign the agreement, the US has effectively taken away the freedom of future generations of Tuvaluans to live where their forefathers have lived for thousands of years,” Laupepa told the BBC.

Tuvalu has asked Australia and New Zealand to allow the gradual move of its people to both countries.

Tuvalu is not the only country that is vulnerable(易受影响的) to rising sea levels. Maumoon Gayoon, president of the Maldives, told the United Nations that global warming has made his country of 311,000 an “endangered nation”.

The skies over Latin America’s largest city are set to witness a futuristic aerospace revolution after the Brazilian airline Gol reached an agreement that could see it transport regular passengers around São Paulo in hundreds of low-cost zero-emission electric air taxis.

Dómhnal Slattery, chief executive of the Dublin-based firm Avolon, which will provide the aircraft to Gol and recently placed an order for 500 of the aircraft from their British manufacturer, admitted helicopters were the “kingdom of the wealthiest”.

But the Avolon boss claimed the introduction of VA-X4 eVTOLs (electric vertical(垂直的) takeoff and landing) aircraft to São Paulo would be a gamechanger for regular passengers once the taxis, which look like a futuristic cross between a helicopter and a glider, were delivered in late 2024 or 2025.

“Our basic estimate (估计) at the moment is that the operating cost here for this aircraft will be equal to $1 per passenger over a 25-mile trip,” Slattery told the Financial Times. “Which is almost equal to an Uber ride.”

Few cities are crying out for such a revolution more than São Paulo, a sprawling metropolis with more than 12 million citizens and choked by a fleet of 8.6m vehicles.

In the late 1990s, the congestion (拥塞) became so bad in what is now the world’s fifth biggest city after Tokyo, Delhi, Seoul and Shanghai that authorities were forced to introduce a number plate rotation (循环) system for vehicles.

Stephen Fitzpatrick, the head of the British aerospace manufacturer that produces the aircraft, Vertical Aerospace, said the flying taxis would be ideal for Brazil’s biggest city and will “transform how we travel around high population density cities that are crowded with traffic”.

The Bristol-based Vertical Aerospace was founded in 2016 and promises to pioneer “a new era in vertical transport”.

“We’ll be looking to Asia after São Paulo,” Avolon’s chief commercial officer, Paul Geaney, told Reuters.