kWh – short for kilo Watt hour is the typical units used to describe a quantity of energy i.e. 1kWh is enough energy to run a 1000 Watt kettle for one hour or a 10W LED light bulb for 100 hours.
sauberen, erneuerbaren Strom jedes Jahr
t – short for tonnes, is the most commonly used unit for CO2 emissions despite being hard to visualize. At normal temperature and pressure a tonne of CO2 would require about 550 sqm. i.e. you would need about 5 tonnes of CO2 to fill an Olympic pool (25m wide x 50m long x 2m deep). A typical fossil fuel power station emits about 500g of CO2 per kWh of electricity produced.