(CNN)This year is on track to be the hottest ever on record, according to NASA.
High concentrations of carbon dioxide (CO2) in our atmosphere are a crucial contributing factor. Can we reduce emissions effectively in our daily lives?
That's what I wanted to find out on ZeDay - Zero Emissions Day - an initiative to inspire people to avoid using fossil fuels for an entire day.
I tried to go emission-free for 24 hours, avoiding any activity directly connected to fossil fuels.
Here's what happened...