There were actually more than 3, so I will mention here four of them!
1) you can donate money to compensate for your carbon dioxide emission when flying
2) they exhibition uses only renewable energy sources
3) the exhibition recycles as much of its waste as possible
4)they try to be "paperless" whenever possible - they avoid unnecessary printing!
PUT YOUR HANDS IN THE AIR THIS IS A ROBBERY!! GIMMIE ALL YOUR POINTS! Thank you for your donation CYA!
Convection is a process which transfers the heat between the temperatures when fluid (i.e. liquid or gas) is in motion. Due to the presence of heat source, water temperature increases and also it will become less dense and rise. Hot air is less dense than cold. When air rises higher in the atmosphere its pressure gets down and it becomes colder.
I think the Earth would say "There are lots of people I'm trying to hold up here. it's getting pretty heavy to be honest. also, they keep using all my stuff!!"
Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix. These sources originate mostly in our local star, the Sun.
