Global climate negotiators have gathered in Lima, Peru, for the annual United Nations climate change conference COP 20, to discuss how to combat climate change and who should pay for curbing the world's fossil fuel emissions.

There is a prevailing theory it should be the rich industrialised nations as they have been responsible for the majority of greenhouse gases. And five years ago, they were pledging to increase funding by $100bn a year by the year 2020.

The UN estimates as much as $175bn has been transferred over the last two years to developing nations, although there is a dispute about whether it is on track to hit that 2020 target.

Developing nations are stepping up but not together. China has said emissions will peak by 2030, while India chose to put economic growth ahead of emissions caps.

Low-lying nations may never be saved as sea levels rise and it is in Asia where some of the poorest nations will be hardest hit by climate change.

The capital of Indonesia, Jakarta, is a city under threat as it is sinking at a rate of seven centimetres every year. By 2030, according to experts, half of the city will be below sea level. Step Vassen reports from the Indonesian capital.

So what can be done to combat climate change? Will world leaders ever manage to act together? And why is it so difficult to reach a consensus on climate change?

Griffin Carpenter from the New Economics Foundation joins Counting the Cost to talk about COP 20 and the climate challenge. 

The danger of deforestation

The preservation of the Amazon rainforest is considered central in the battle against global warming. But in Peru, the venue for this year's crucial climate change conference, illegal logging continues at unprecedented rates.

"Mostly everyone here makes their money from illegal logging. You pay off the police and the right people," Romelo Sangan, an illegal logger from Peru told Al Jazeera.

Deforestation has many causes - from slashing and burning for agriculture, to harvesting precious hardwoods for the construction industry.

In South Sudan, many people are chopping down trees just to exist. The country's oilfields generate billions of dollars a year, but all the oil is exported, leaving millions of people to rely on wood and charcoal for fuel. The current rate of deforestation will mean no forest will be left in South Sudan within three or four decades.

Al Jazeera's environment editor Nick Clark reports more on illegal logging in Peru and deforestation in South Sudan.

Oil and ISIL: The business behind the violence

As the armed group ISIL pushes to dominate more territory in Iraq and Syria, many think that the fighters who have joined ISIL must be motivated by a fanatical commitment to ideology.

But in an extraordinary look inside ISIL with rare access to key figures in the organisation, Al Jazeera correspondent Nick Shifrin found that ISIL's management, organisation, and wealth are all dependent on foot soldiers whose main motivation is income.

Counting the Cost is joined by Michael Stephens, deputy director of RUSI Qatar, to discuss ISIL's source of income.

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Source: Al Jazeera