hard and sturdy material used to build houses
concrete
to put furniture or equipment together
install
something that can be used more than once
reusable
causes danger and harm
dangerous
works well to achieve the results that you want
effective
living and non-living things that are related to the sea
marine
capable of being replaced by natural ecological cycles
renewable
to describe intense and serious situations
severe
to change waste materials into new materials and objects
recycle
reaching a high or the highest degree of something
extreme
the introduction of harmful substances or products into the environment
pollution
a source of suppy, support, or aid that be easily used when needed
resource
