Suggestion about making a slogan/saying please?

Question

i don't know if slogan and saying has only 1 meaning but i consider them as 1.

I need some suggestion on making a slogan for our contest tomorrow.

This is our theme:

Climate Change:

Warming up the Youth for Global Environment Activism.

I'll appreciate all answers that will be posted. Thanks for advance whoever those people who can help me.

Answer 1

Emit now? Pay later!

It's not cool to be hot.

Change your ways or the climate will!