I live in Denmark and I can tell you that very few people outside the extreme left believes that the 70% will be achieved (this includes Dan Jørgensen).
The 70% figure was the price that the social democrats had to pay to the left in order to form a government. The way that the government are purposing to meet the 70% goal is through technical innovation sometime in the future - they have shown a, totally not made up, hockey stick figure where everything is fixed in the laste couple of years - long after the government session has ended.
In other words. It is nothing but BS.
The only thing that this government is interested in is raising taxes and handing out money to potential voters. They do not care about the environment or economy.