Some large birds have been killed by their turning blades, so the newest turbines have blades which rotate very slowly. In the USA, windfarms and windranches are sprouting from Pennsylvania to the West Coast. Farming and ranching continue among the wind-towers. Leasing space for the towers is starting to save family farms. The only emission from hydrogen fuel cells is water.
Fuel cells are a technology which has been performing for decades on our manned space flights.
Hydrogen gas can also be used directly, as a fuel to replace natural gas and oil. When it burns, the only product is water. The current creates hydrogen by passing through acidic water. The new PV cell may have made hydrogen commercially competitive, even before natural gas prices rose. The hydrogen economy, with the hydrogen provided by various types of solar technologies, can liberate the planet both from production of more radioactive poisons by nuke-plants and from the greenhouse gases and other pollutants produced by fossil fuels.