Genetic Resistance. Can be developed within 5-10 years by insects (much sooner in tropical areas). It is a developed immunity to pesticides that, through natural selection, can make the insects come back stronger. Weeds and plant disease organisms also develop this, but much more slowly. Tolerance Level
greenhouse definition: The definition of a greenhouse is a building made of glass panes in which heat and humidity can be regulated in order to grow plants. (noun) An example of a greenhouse is where vegetables can be grown when the outside weather is bel...
greenhouse gas. Any of the atmospheric gases that contribute to the greenhouse effect by absorbing infrared radiation produced by solar warming of the Earth's surface. They include carbon dioxide (CO2), methane (CH4), nitrous oxide (NO2), and water vapor.