warming means that plants which can only cope with certain
temperatures have to move northward to stay in the same temperature
range. This is difficult if you live on a mountain!
species are plants (and animals) which have been introduced
into an area they don’t belong and spread as they do
not have any predators. They take over space and nutrients
that local species need to survive.
the human population increase we are building more roads and
buildings and covering land that would have been home to plants.
This is called urbanisation
are destroying plant habitat for many reasons, for example
deforestation to log valuable hardwoods, or to gain more agricultural
land or to mine for metals.
chemicals poison the land and prevent plants sensitive to
pollution from growing. Excess use of nitrates (found in fertilisers)
causes ‘algal blooms’ to grow in water ways which
block out the light and starve other living organisms.