MIXTURE OF GASES THAT FORMS A LAYER AROUND EARTH

THERMAL ENERGY FROM WITHIN EARTH

NATURAL RESOURCE THAT WILL NOT RUN OUT, NO MATTER HOW MUCH OF IT PEOPLE USE

PART OF THE ENVIRONMENT THAT SUPPLIES A MATERIAL THAT IS USEFUL OR NECESSARY FOR THE SURVIVAL OF LIVING THINGS

NATURAL RESOURCE THAT IS BEING USED UP FASTER THAN IT CAN BE REPLACED BY NATURAL PROCESSES

NATURAL RESOURCE THAT CAN BE REPLENISHED BY NATURAL PROCESSES AT LEAST AS QUICKLY AS IT IS USED

ACIDIC RAIN OR SNOW THAT FORMS WHEN WASTE GASES FROM AUTOMOBILES AND POWER PLANTS COMBINE WITH MOISTURE IN THE AIR

SCIENTIFIC OBSERVATION THAT EARTH’S AVERAGE TEMPERATURE IS INCREASING

TO APPEAR OR HAPPEN

PREVENTS MOST HARMFUL ULTRAVIOLET (UV) RADIATION FROM REACHING EARTH

TYPE OF AIR POLLUTION THAT IS FORMED WHEN SUNLIGHT REACTS WITH WASTE GASES FROM THE BURNING OF FOSSIL FUELS

CONTAMINATION OF THE ENVIRONMENT WITH SUBSTANCES THAT ARE HARMFUL TO LIFE

SOMETHING THAT HAS TWO DIFFERENT COMPONENTS PERFORMING ESSENTIALLY THE SAME TASK

MANUFACTURING NEW PRODUCTS OUT OF USED PRODUCTS

ACT OF MEETING HUMAN NEEDS IN WAYS THAT ENSURE FUTURE GENERATIONS ALSO WILL BE ABLE TO MEET THEIR NEEDS