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Global study shows uneven urbanization among large cities in the last two decades

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According to the latest report from the United Nations (UN), the global population in 2018 was 7.6 Credit: The University of Hong Kong. The country had undergone the biggest urban expansion in the period, between 2001 and 2018, its BUA increase accounted for 47.5% billion and the urban population was 4.2

Global 433
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New phase of globalization could undermine efforts to reduce CO2 emissions

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A new study finds that the growth of carbon production from Chinese exports has slowed or reversed, reflecting a “new phase of globalization” between developing countries that could undermine international efforts to reduce emissions. The paper is published in Nature Communications.

Global 170
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Harvard/Nanjing study: China’s war on PM2.5 pollution is causing more severe ozone pollution

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In early 2013, the Chinese government declared a war on air pollution and began instituting stringent policies to regulate the emissions of PM 2.5. Paulson School of Engineering and Applied Sciences (SEAS) and the Nanjing University of Information Science & Technology (NUIST), found that while PM 2.5 Ke Li, Daniel J. 1812168116.

Ozone 262
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Study: countries seeking to cut CO2 emissions must get a handle on city-level emissions

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The researchers set out a framework for gathering and analyzing local information about how cities contribute to pollution levels, and show how these insights could be used to target climate mitigation initiatives most effectively. Total CO 2 emissions of 182 Chinese cities. Shan et al. 6, eaaq0390 doi: 10.1126/sciadv.aaq0390.

Emissions 210
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PNNL-led international study finds ultrafine aerosols have outsize impact on storm clouds, precipitation

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Scientists have known that aerosols may play an important role in shaping weather and climate; the new study shows that the smallest of particles have an outsize effect. Aerosol impacts are a key uncertainty in understanding the current and future climate as well as extreme weather. —Jiwen Fan.

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TOAR shows present-day global ozone distribution and trends relevant to health; public database

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Source: University of Leicester. Source: University of Leicester. We created the largest database of surface ozone from hourly observations at more than 4,800 monitoring sites worldwide, and we’re making these data freely available to anyone who wants to investigate the impact of ozone on human health, vegetation, and climate.

Ozone 255
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Study: ozone levels higher across China than in other countries tracking the air pollutant

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We find that in the most populous urban regions of Eastern and Central China, there are more than 60 days in a calendar year with surface ozone levels exceeding the Chinese national ozone air quality standard. —Lin Zhang of Peking University, lead author. Xiao Lu, Jiayun Hong, Lin Zhang, Owen R. Cooper, Martin G. 8b00366.

Ozone 199