Life expectancy at birth, female (years) ( 1 ) United Nations Population Division. World Population Prospects, ( 2 ) Census reports and other statistical publications from national statistical offices, ( 3 ) Eurostat: Demographic Statistics, ( 4 ) United Nations Statistical Division.
Effect on human health: The land when contaminated with toxic chemicals and pesticides lead to problem of skin cancer and human respiratory system. The toxic chemicals can reach our body through foods and vegetables that we eat as they are grown in polluted soil.
Sometimes this waste can build up to harmful levels. Examples of human waste that can affect ecosystems are: household waste. industrial waste. agricultural waste. gases produced when fossil fuels are burned. Humans sometimes harvest plants and animals from natural ecosystems and this can also unbalance them. For example, harvesting timber can lead to soil erosion and loss of habitat, while harvesting fish from the oceans can cause species to become threatened and unbalance food webs.