Warmist Bjørn Lomborg by the 2070s, climate change may cost the world somewhere between 0.2 per cent to 2 per cent of GDP

Bjørn Lomborg is a warmist.

He believes that man's CO2 emissions are warming the planet. However, he also knows that they are not dangerously causing destruction and it will cost billions of useless dollars to try to counteract the warming.

Bjørn has issued an analysis of Al Gore's An Inconvenient  reported in the Australian:

He says:
Even astrophysicist Stephen Hawking recently declared that US withdrawal from the Paris climate treaty “could push the Earth over the brink, to become like Venus, with a temperature of 250 degrees (Celsius), and raining sulfuric acid”.
How stupid is that? Even the UN's worst scenario does not support that.

Bjørn Lomborg continues:
The IPCC estimates that, by the 2070s, climate change may cost the world somewhere between 0.2 per cent to 2 per cent of GDP. That’s a problem, but by no means the end of the world. The IPCC finds that for most economic sectors, “the impact of climate change will be small relative to the impacts of other drivers” such as changes in population, age, income, technology, relative prices, lifestyle, regulation and governance.
Now, remember, as noted above, Bjørn Lomborg is a warmist. He believes that man's CO2 emissions are causing/contributing to global warming.

Bjørn Lomborg notes that:
The Paris Agreement will cost each American $US500 a year, each European $US600 and each Chinese person $US170. Despite rhetoric about keeping temperatures below 1.5C, these promises together will achieve almost nothing. By the UN’s own estimate, the Paris Agreement will reduce emissions by less than 1 per cent of what would be needed to keep temperature rises under 2C (a less ambitious target than 1.5C) yet will cost $US1 trillion to $2 trillion a year by 2030, mostly in reduced GDP growth. The treaty will deliver far less than most people expect, yet will cost much more than most people are willing to pay. 
Achieving significant cuts would be much more expensive. For the EU to fulfil its promise of cutting emissions by 80 per cent in 2050 (the most ambitious climate policy in the world), the average of the best peer-reviewed models show that the cost would run to at least $US3 trillion a year, and more likely double that — meaning $US6000 for each EU citizen a year.
AND this is for the so-called, rich countries. As Bjørn explains:
The world’s poor are given an even worse deal. They are most vulnerable to climate change, but they are also the most vulnerable to a long list of health and development challenges that often go overlooked.
Bjørn explains that:
Fostering a sense of panic doesn’t just distract us from other issues; it also means we don’t tackle climate change well. Economic studies show the right way forward is not subsidising inefficient solar panels, the mainstay of today’s climate spending, but to increase investment in green energy research and development to push down the cost below fossil fuels. 
Over-the-top, alarmist rhetoric has a real cost. It encourages us to engage in phenomenally expensive and unhelpful climate policies while ignoring the smaller, cheaper and more realistic ways to respond to this and the challenges that will be much more pressing.