There’s scores of session at the Earl’s Court sustainability exhibition and conference. We pick five debates worth catching at the Ecobuild Arena

A wide range of views will be voiced at the Ecobuild Arena, which takes place from Tuesday 2 to Thursday 5 March. These range from industry experts on sustainable design and construction to politicians, authors, environmentalists, economists and historians. We select five must-see sessions:

Population and sustainability

Can we create a low carbon future with more people? A debate that will include former deputy leader of the Labour Party Roy Hattersley, chairman of MigrationWatch UK Sir Andrew Green and scientist John Guillebaud 3 March 1.30pm

Changing behaviour and climate change

Former Tory minister and broadcaster Michael Portillo discusses psychology and sustainability with a philosopher – Julian Baggini, an author - George Marshall – and a green thinker – Prof Herbert Girardet 4 March 11.45am

Do green buildings have to be ugly?

academic and broadcaster Germaine tackles the aesthetics of green with architect Bill Dunster, former Friends of the Earth director Tony Juniper and National Housing Federation boss David Orr 4 March 5pm

The economics of sustainability

Global warming sceptic and former Chancellor Lord Nigel Lawson is one of three speakers on how the environment and economics relate. 5 March 11.15am

Great energy debate

Authors and journalists including David Strachan and Mark Lynas look at the future of energy creation 5 March 2pm