Zero Emissions Day
Zero Emissions Day is held on September 21. This event in the third decade of the month September is annual. 
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The importance of Zero Emissions Day is immense since this movement has everyone’s best interest at heart – we can all start making small changes that will contribute to making the world a better place and help preserve life on our planet.
There's more carbon dioxide in our atmosphere than at any time in human history. We're on the path to exceeding 1.5C of warming. Extreme heat events have become more frequent and severe. Put simply, net zero means we are not adding new emissions to the atmosphere.
The purpose of this day is to give our planet a break from fossil fuels and what they release into the air, at least for one day, every year. This encompasses greenhouse gasses, polluting substances, microparticles, and other things that are harming our planet. The importance of Zero Emissions Day is paramount because it aims to encourage the use of renewable energy sources, as opposed to finite fossil fuels.
Similar holidays and events, festivals and interesting facts
World Cleanup Day on September 20 (the third Saturday of September);
National Canal Conservation Day in Thailand on September 20
International Coastal Cleanup Day on September 20 (Held on the third weekend of September);
Arbor Day in Brazil on September 21
International Day of Struggle against Monoculture Tree Plantations on September 21
National Elephant Appreciation Day in USA on September 22
World Rhino Day on September 22
World Protection Elephant Day on September 22