Import: To bring goods or services into a country from another country for sale or trade.

Indigenous: A naturally occurring species.

Inorganic: Not living.

Invertebrates: Animals that do not have backbones.

Insulin: It controls how much sugar is in an animal's blood.

Kilowatt: A unit of measure for electricity that equals one thousand watts

Kilowatt-hour (kWh): The amount of energy present in one kilowatt of electricity supplied for one hour of time. Electricity is sold as kilowatt-hours. People pay for electricity by the number of kilowatt-hours used.

Landfill: An enormous pit where trash is buried under shallow layers of dirt.

Lichen: Its not a plant. It is one living thing made up of two organisms - algae and fungi. It looks like a dry plant. It grows in places where plants can't like bare rock and tree bark.

Livestock: Domestic animals, such as cattle or horses, raised for home use or for commercial purposes, such as a farm.