World Climate Summit: Four ways to fight back the 'trillionth tonne carbon'

World Climate Summit is just about coming to an end now, but I'm glad to say it isn't going out with a limp. One of the final talks of the event was titled 'What are the big ideas on climate change to avoid the trillionth tonne carbon?' and it was every bit as intense as it sounds.

Moderated by BBC World News presenter Nik Gowing, the lightning-fast session confronted several of the so-called 'big ideas' hoping to transform the environmental landscape.

First up was Georgia Callahan, the general manager of Environment and Climate Change at Chevron, speaking to promote carbon capture and storage (CCS). According to Callahan, CCS is not the be all and end all of solving climate change, but the technology has the potential to stop the 'trillionth tonne'. She believes it is crucial that people understand CCS better than they do today, and has set 2020 as a guideline for spreading the word significantly.

Next to take centre-stage was Patrik Isaksson, the vice president of Environmental Affairs at Svenska Cellulosa AB. He believes that the future of the environment lies in our treatment of the world's forests. According to Isaksson, Swedes plant two trees to replace every tree is cuts down, and forests in the country are now growing at a rate of one per cent per annum. He doesn't expect the rest of the world to embrace Sweden's mindset, but to follow in these footsteps would, in his opinion, be a major jump forward, or as he put it, "If everyone did it like Sweden, the world's biggest problem would be solved."

Then came Jens Dinkel, the vice president of Sustainability at Siemens. His method – electrifying cities towards zero emissions – would see cities targeted as vital, must-change areas. According to Dinkel, urban spots are responsible for generating 70 per cent of the world's carbon emissions and his aim is for at least 20 cities to adopt 'zero emission' policies by 2020, switching over to all-electric sources in the process. He understands that this would be highly problematic to implement, since huge amounts of money and work would have to go into a city-wide overhaul, but the outcomes and payback could also prove huge.

Mandy Rhambaros, the Climate Change and Sustainability manager at Eskom Holdings, also had some interesting ideas. In her opinion, 'low carbon electrification of remote locations' is the best way forward. As part of this idea, she would campaign to take electricity to unconnected regions, for example in parts of Africa. As well as bringing people out of poverty, this solution has the potential to create a carbon-neutral community.

Unfortunately for us, strict time restraints and rumbling stomachs cut the debate there, so we didn't have the opportunity to delve deeper into the ideas or indeed pick holes in any of the offerings. Thus ends World Climate Summit and, from entrepreneurs to the launch of Active2020 and innovation to public-private partnerships, we've seen a lot here in Warsaw.

Follow the links above for everything that went down in Poland.