Habitat is the environment in which natural or human species live. And the defined area in the where organism exists, such as water lilies can only be found in aqueous conditions or reindeer on tundra and mountains
Halos are CFC (other greenhouse gases halocarbon) used, for instance, in firefighting equipment.
Hard fibre is a term used to describe a group of fibres made from leaf and fruit monocotyledonous plants (vegetable fibres) obtained from the supporting tissue of large leaves from tropical, sub-tropical plants.
Hazardous Substances (RoHS) is an EU directive to limit the use of dangerous substances in electrical and electronic equipment and at the same time promote the recycling and or re-use of such products.
Hazardous waste, or combination of scraps, that may cause or significantly contribute to an increase in mortality or an increase in serious irreversible or incapacitating illness or that poses a substantial present or potential hazard to human health or the environment.
Heavy metal is a term used to describe a subset of a large number of metals and metalloids with high atomic(such as chromium, cadmium, arsenic and mercury), listed in the periodic table of the elements, which have properties of both metals and non-metals.
HEAVY METALS OVERVIEW GRAPHICS
Hemp fibre is a bast fibre probably used first in Asia. The cord is dark tan or brown and is difficult to bleach, but it can be dyed bright and dark colours. The hemp fibre varies widely in length, depending upon their ultimate use. Industrial threads may be several inches long, while fibre used for domestic textiles are about 1.9 to 2.5 cm.