Possible answers
1 The article headline uses the colours to represent different types of energy industries. Black represents the oil industry and green represents renewable energies – in this case, solar power.
It symbolises the story about a large oil company, Total, buying a solar energy company in the USA, SunPower.
2 He will cut his electricity bill by 50 percent and he will get a tax deduction from the government.
3 It’s a large oil company
4 It has spent more than any other large oil or gas company on a renewable energy business.
5 The risks are stricter regulations on emissions and more competition from the renewable energy industries.
6 To stay only in the oil and gas industry because demand will continue for decades or to move into the renewable energy business as well.