Renewable energy What is it? What are the sources of renewable energy?

Renewable energy is the energy that comes from resources which are abundant and will never run out

Renewable energy resources Wind power Advantages Abundant supply In strong wind areas produces large quantities of electricity Zero pollution Cost effective Disadvantages Initial cost of set up Reliability/intermitting supply Large land space needed Aesthetic pollution

Solar Power Energy produced from solar collectors(photovoltaic) catching solar or ultra violet rays Advantages Disadvantages Infinite amount of sunlight Free energy No pollution Photovoltaic cells make no noise Low maintenance Expensive to set up Exposure to sunlight(climate) Night time Power ratio compared to fossil fuels

Hydrogen Power Advantages Disadvantages Readily available No harmful emissions Environmentally friendly Fuel efficient Expensive Storage Highly flammable Existing infrastructure

Bio-fuel Biofuels are energy sources made from living things, or the waste that living things produce Advantages Disadvantages Cost benefit Reduction of greenhouse gasses Economic security Reduces dependence on foreign oil High cost of production Monoculture Use of fertilizers Water use

Geothermal energy Geothermal energy is the energy obtained from the earth(geo) from the hot rocks present inside the earth Advantages Disadvantages Non polluting Can be used directly Do not occupy much space Not weather dependant Only a few sites Most sites are far from cities Always a danger of eruption or volcano Initial cost

Hydro electric power Advantages Disadvantages Reliability( can be switched on to suit demand) Safe No pollution Water is not consumed in the process Massive investment cost Droughts Limited reservoirs Ecological footprint