China and the usa
water pollution and Air pollution
they are air and pollution
The two main sources of air pollution are the toxins released from factories and automobiles.
The two main types of environmental pollution in Russia are air pollution and water pollution. Air pollution is primarily caused by industrial emissions, transportation, and burning of fossil fuels. Water pollution is commonly due to agricultural run-off, industrial discharges, and inadequate wastewater treatment.
air and pollution
China and India are two due to large populations and uncontrolled air and water pollution from industry.
Water Pollution , Air Pollution .. Hope it will help
Particles and Gasses
Two of the many kinds of pollution are air pollution and water pollution. Air pollution is caused when chemicals, such as carbon monoxide and sulfur dioxide, get released into the air and go towards the atmosphere. Water pollution is caused when waste products and contaminants get released and get into rivers, causing groundwater, liquid spills, waste water discharges, and littering. I got this answer at wikipedia I you on whatever you are doing.
India and Brazil followed by Equador and China
Vehicles and heavy industry (steel, glass, textile and chemical plants are the worst offenders) are the top contributors to bad air quality in Mexico City.
two or three it depends on the structure