global warming is when worldwide temperature increases
global_warming is weather. global_warming is not weather. greenhouse_gases is causing_world's_temperature_to_rise. global_warming is effecting_weather. global_warming is heating. global_warming is heating_air. global_warming is not effecting_weather. global_warming is temperature_change. global_warming is not temperature_change. greenhouse_gases is not causing_world's_temperature_to_rise.