2016 was the warmest year on record, and the concentration of CO2 in the atmosphere is at the highest level ever measured. To slow down climate change, we must transform society with CO2 neutral solutions. This also applies to the way we produce energy. Energy must be based on renewable sources rather than fossil fuels. At DONG Energy, we want to lead the transformation to renewable energy, while at the same time operating a sustainable business, which is respectful of society, the environment and people.
We are the energy company in Europe that has come the furthest in the green transformation. In 2016, green power and heat accounted for 50% of our energy generation. And we have reduced our CO2 emissions with 52% since 2006. We now raise the bar with new ambitious targets. By 2020, our CO2 emissions must be reduced by 78% relative to 2006, rather than our previous target of 60%. And by 2023, we want to achieve a 96% reduction.
The transformation is driven by our investments in offshore wind farms and our conversion of power stations to biomass. By 2025, our ambition is for our installed offshore wind capacity to be able to supply green electricity to 30 million people. This development is partially driven by a continuously declining cost of offshore wind. And we want to continue the conversion of our power stations from coal and gas to sustainable biomass. We have now set ourselves the target to be completely rid of coal by 2023.
In 2016, we decided to divest our oil and gas production activities. This means that over the coming years, we will be phasing out the production of oil and gas as well as the use of coal. Gas is a flexible fuel that emits only half as much CO2 as coal, and we therefore still believe that gas can play an important role in the transition to a green future. We will therefore continue to trade, transport and sell gas.
In 2016, we achieved the best results ever for employee safety and job satisfaction. It makes me proud, because it is a sign that our company is characterised by a strong culture and robust processes.
In 2016, DONG Energy's Board of Directors approved an updated policy on sustainability – our Sustainability Commitment. In the policy, we commit to running our business in a way that supports the UN Sustainable Development Goals. Moreover, for the tenth consecutive year, we commit to promoting the UN Global Compact principles on respect for human rights, labour rights, the environment and anti-corruption.