gases released during the use of fossil fuels causes global warming
worldwide_excess_of_carbon_dioxide has resulted_in_global_warming greenhouse_gases is causing_world's_temperature_to_rise. global_warming is heating. global_warming is heating_air. greenhouse_gas is gas. methane_gas is greenhouse_gas. worldwide_excess_of_carbon_dioxide has not resulted_in_global_warming greenhouse_gases is not causing_world's_temperature_to_rise. combustion_of_fossil_fuels is common_source_of_air_pollution.