one
3 percent is useable to humans and land animals
The Earth's largest land areas are the continents.
30%
yes
It is approx 3037/14943.
yes
150,000,000 sq km/57,500,000 sq mi
no water covers 71% of the earths surface and land 29%
water covers a bigger area of earths surface in ration 3 : 1
nothing
nothing
no, they cover 40%. i was surprised when i found that out.