4.) green energy sources petroleum and coal can meet the energy demands of the united states for decades to come, but are causing costly climate changes locally and globally due to emitted co2 a.) what are some of the benefits of burning hydrogen (h2) for energy to run your car, to provide electricity, and/or to heat your home? be specific. hint: do some research. (4 points) b) where can you get h2? how can you make it? (4 points) c.) what are some risks of converting to a h2 economy? (2 points)

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.