International Energy Agency
Multinational oil giants Shell and Chevron have been forced to stall oil production in Nigeria in recent weeks as the uptick in violent attacks on pipelines puts pressure on the country's finances.
As negotiators from nearly 200 nations seek to hammer out a global agreement on climate change, Yvo de Boer worries that it may not be enough to boost clean energy investment and hold off dangerous levels of warming.
The report highlights the debate over whether nations can grow their economies at the same time as reigning in their greenhouse gas emissions.
The International Energy Agency says nations have slashed fossil fuel subsidies by nearly $27 billion, improving market conditions for the development of renewables.