agriculture
arid
bud
care
climate
conservation
conserve
crack
deforestation
desert
destruction
disaster
drought
dry
earth
ecology
environment
famine
forestation
germinate
global warming
green
ground
grow
growth
hand
heart
heat
hope
hot
land
leaf
life
love
nature
plant
preservation
protect
sand
save
scarcity
seed
shortage
soil
sprout
surface
tree
water
weather
young