2 . As reported in JAMA Surgery, the researchers discovered that e-scooter(电动摩托车) injury rates had increased dramatically in just four years, rising from 6 per 100,000 in the population to 19 per 100,000. Of the estimated 14,651 e-scooter-related injuries in 2018, 4,658, or 32%, involved the head. “While most people recover from head injuries, there is going to be a subset with long-term disability and life changes,” said Dr. Benjamin Breyer.

Dr. Benjamin Breyer of the University of California, Los Angeles, pointed to a 2019 analysis of the data from two hospitals in Southern California, which found just 4.8% of injured e-scooter riders were wearing helmets.

Dr. Joann Elmore, a professor of medicine at the University of California, Los Angeles, believed that most e-scooter users are probably unaware of the risks. To make the point, she described a photo taken by a colleague. “There were two riders on an e-scooter,” she said. “No one had shoes on. There were no helmets. And the woman in front had a baby in a baby carrier.”

The new report highlights the need for more research on new technologies, said Dr. Guohua Li, a professor of epidemiology(流行病学).

“Just as there is a global network of experts working on infectious diseases, there needs to be a similar program devoted to the surveillance(监视，监察) and prevention of injuries caused by merging technologies products and lifestyles, such as e-scooters, e-sports, etc.,” Li said in an email.

“The challenge for researchers and policymakers is to keep up with the ever-changing society and protect the public from unnecessary harm caused by new technologies and products without hindering innovation,” he added.

3 . You'll need to take a deep breath before hearing this news. An astonishing 93% of kids around the world live in environments with air pollution levels that are damaging their health, according to a new report by WHO.

Air pollution is to blame for the deaths of 543,000 kids under 5 in 2016, with more than one in four deaths of children under five years old being related to environmental issues. Exposure (暴露)to air pollution can damage the health of kids in a variety of ways, either causing or being associated with everything from low birth weight to childhood obesity and so on.

"The large toll of disease and death revealed (揭示)by these new data should result in an urgent call to action for the global community especially for those in the health department WHO stated. “ Strong action to reduce exposure to air pollution offers an opportunity to protect the health of children. " The report stressed that health experts should communicate with families , communities and policy-makers about the serious risks of air pollution exposure. " Although more researches into how air pollution affects children's health will continue to be valuable, there is already evidence to justify strong, swift action to prevent the damage it clearly produces," WHO added.

Disease caused by dirty air is more common in low-and-middle in come countries, especially those in Africa, South-East Asia, and Western Pacific regions. Poor countries in these areas have the highest levels of exposure to household air pollution due to the use of polluting fuels and technologies for basic needs like cooking, heating and lighting.

Advised solutions include cleaner transport , cleaner cooking and heating fuels and technologies   energy-efficient housing and urban planning, safer industrial technologies and better waste management.

4 . The conclusion of the Paris Agreement in 2015，in which almost every nation committed to reduce their carbon emissions(排放)，was supposed to be a turning point in the fight against climate change.But many countries have already fallen behind their goals.Meanwhile emissions worldwide continue to rise.

The only way to catch up is to aggressively pursue an approach that takes advantage of every possible strategy to reduce emissions.Wind and solar energy are usually part of this effort，but it must also include investing heavily in carbon capture(碳捕捉)，utilization(应用)and storage(CCUS)—a range of technologies that pull carbon dioxide from the air，and transform it into useful materials or store it underground.Although CCUS has been opposed as too expensive and unproved，recent gains have made it far more effective.Improvements such as chemical compounds could drive the cost down from $1 00 per ton of captured carbon in 20 16 to $ 20 per ton by 2025，according to a 2016 article in Science.

Three primary CCUS paths lead to the reduction of carbon emissions:retrofitting(改装)existing power plants；reducing emissions in industries that cannot run on renewable energy；and directly removing carbon from the air.Cutting emissions from existing electric power stations with CCUS could be made more appealing in a future with a circular carbon economy，in which captured carbon could be resold and recycled for other uses——for instance，serving as a raw material for making concrete or plastics.

The basic idea of carbon capture has faced a lot of opposition.Skepticism has come from climate change deniers，who see it as a waste of money，and from passionate supporters of climate action, who fear that it would be used to justify continued reliance on fossil fuels.Both groups are ignoring the recent advances and the opportunity they present.By limiting investment in decarbonization，the world will miss a major avenue for reducing emissions in a variety of industries.CCUS can also create jobs and profits from what was previously only a waste material by creating a larger economy around carbon.

The transition to clean energy has become necessary.But that transition’s ability to achieve deep decarbonization will become less effective without this wide range of solutions，which must include CCUS.