the entire world wants to save earth by having a zero net carbon footprint

some of the ways we can do this is

plant more trees
go for renewable energy – wind , solar , tidal, batteries
go for electric vehicles
light saving electric bulbs
water re-cycling
rain water harvesting
green house farming
sanitation for all homes .. sewage pipes
energy creation from household garbage …
individual homes having solar panel on top of their homes and a battery power backup