PHOTO: Anastasia Beltyukova / CNN
(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…