The coronavirus lockdowns have led to significant improvements in air and water quality, prompting calls for a low-carbon future. However, the urgency to re-employ millions of people is overshadowing these environmental gains. Wildlife has returned to city streets, with wolves, deer, and kangaroos being spotted in normally busy areas. Fish have been seen in Venice canals free from pollution caused by motor boats, and residents in India have caught a glimpse of the Himalayas for the first time in years. Satellite imagery has shown improved air quality in Europe and Asia, including China where the pandemic began. Despite these positive changes, residents in China are concerned that pollution levels will rise again as the economy restarts. Tang Zhiwei, a 27-year-old resident of Shanghai, mentioned that as the epidemic subsides in the second half of the year, the weather is expected to worsen gradually once factories reopen. He advised people to make the most of the current blue skies. Greta Thunberg emphasized that addressing the coronavirus crisis does not mean the climate crisis has disappeared, stressing the importance of tackling both simultaneously. UN Secretary-General Antonio Guterres urged governments to use their economic responses to the pandemic to address the even more urgent issue of climate change in a message for Earth Day. Guterres warned governments against bailing out heavily polluting industries as investors and industry lobbyists clash over "green stimulus" measures and weakening climate regulations. Peter Betts, a former lead climate negotiator, emphasized the importance of coronavirus economic stimulus packages being "low-carbon, climate-smart", expressing concern that some governments may prioritize economic recovery over environmental concerns. US President Donald Trump sees getting America, especially its oil and gas industry, back to work as a top priority. Trump tweeted his commitment to not letting the industry down and called for a plan to secure funds for these important companies and jobs. Last year was the hottest on record in Europe, with rising environmental stakes exacerbated by unprecedented levels of heat-trapping greenhouse gases in the atmosphere, according to a study released on Earth Day by the European Union's Copernicus Climate Change Service (C3S). C3S director Carlo Buontempo told Reuters that the warming trend is now undeniable worldwide, leading to an increase in the frequency of record-breaking events. The head of the World Meteorological Organization (WMO) stated that the coronavirus pandemic is expected to cause a 6% decrease in carbon dioxide emissions this year, the largest drop since World War Two. However, the WMO emphasized that this reduction will not halt climate change, as sustained climate action is still necessary despite the temporary decrease in greenhouse gas emissions due to COVID-19. Due to millions of people staying home, there has been an improvement in air quality in China. Emissions in Shanghai decreased by almost 20% in the first quarter, and in Wuhan, where the pandemic began, monthly averages dropped by over a third. However, experts are concerned that this decline may allow China to ignore pollution in order to boost the economy, which suffered its first decline on record in the first quarter.