Talk About Stars by Bolucevschi Vitali Nicolai, Moldova Photograph: Bolucevschi Vitali Nicolai/CIWEM
Winner: Microburst and dust storm by Nick Moir, Australia
A microburst from a high-based thunderstorm causes a dust storm in the heatwave ravaged parts of south-west New South Wales a week before the devastating "Black Saturday" bushfires in Victoria Photograph: Nick Moir/CIWEM
Runner up: Amazonian deforestation aerial by Gustavo Jonovich, Argentina Photograph: Gustavo Jononovich/CIWEM
Highly commended: Solar energy versus fossil fuel by Dave Walsh, Ireland
"This is a chance photograph taken in December 2008 - with a colour cast from the evening sunlight, taken while along Dollymount Beach on the Bull Island Unesco biosphere reserve in North Dublin. I'd been out looking for seals to photograph when I saw this scene unfolding in front of me. I had my 400mm lens on, so I used it to photograph the sun dropping behind the Dublin hills and Poolbeg electricity generating station - which operates on a mixture of oil and natural gas. The photograph speaks to me of future climate change and the resultant global warming. With an overheating planet, we still insist on belching out emissions from fossil fuels. The people in the photograph - although actually a couple of kilometres across the water from the building, appear to be marching blindly towards it, in a mixture of confusion and hope" Photograph: Dave Walsh/CIWEM
Highly commended: Peats Ridge by Nick Moir, Australia. A New South Wales volunteer firefighter hauls a hose in front of flames at bushfire north of Sydney at Peats Ridge Photograph: Nick Moir/CIWEM
Highly commended: Water for All by Claudio Sica, Italy Photograph: Claudio Sica/CIWEM
Runner up: Fog Arising by Daniel Sin Gim San, Singapore Photograph: Daniel Sin Gim San/CIWEM
Highly commended: Lonely Tree by Johan Ensing, Netherlands Photograph: Johan Ensing/CIWEM
Highly commended: Glacier by Carlotta Maitland Smith, England Photograph: Carlotta Maitland Smith/CIWEM
Highly commended: Solitary Soul by Anindya Majumdar, India Photograph: Anindya Majumdar/CIWEM
Contrast by Philippe Moes
Trees, rocks and a red dune provide incredible contrast in the Namib desert, 2009 Photograph: Philippe Moes/CIWEM
Winner: Living Stone, A Community Losing its Life by Khaled Hasan, Bangladesh.
"Man and machine unites working day and night, to spin the life circle of the stone industry. Kalam Ali (age 26) has been working at a stone crushing machine for last four years. He knows there are many risks. He covers his face using his Gamchha (local weaved cloth), as an attempted safety measure from breathing in dust particles" Photograph: Khaled Hasan/CIWEM
Runner up: Sand Story by Trần Việt Vãn, Vietnam Photograph: Trần Việt Vãn/CIWEM
Highly commended: In the Womb by Sourav Karmakar, India Photograph: Sourav Karmakar/CIWEM
Highly commended: Born from Hell: Innocent Victims of a Chemical Legacy 2 by Alex Masi, England
Salman, 13, a second generation victim of the Bhopal industrial disaster in India, is standing by the entrance of his home in one of the slums surrounding the former Union Carbide pesticider plant in Bhopal. Salman was born blind and with serious neurological deficiencies because of his mother's exposure to concentrated pesticides and contaminated water Photograph: Alex Masi /CIWEM
Diminishing Resources by Gina C. Meneses Photograph: Gina C. Meneses/CIWEM
Highly commended: Cuban Salsa Nights by Charles C. Mahoney, Spain Photograph: Charlie Mahoney/CIWEM
Winner: Train Station Arrival by Jordan Mary, England Photograph: Jordan Mary/CIWEM
Runner up: Lady in Red by Michaela Hope Heron, New Zealand Photograph: Michaela Hope Heron/CIWEM
Highly commended: Deaf By Ignorance by Ben Foertsch, Germany Photograph: Ben Foertsch/CIWEM
Highly commended: Happy Moments by Courtney Krawec, Australia Photograph: Courtney Krawec/CIWEM
Winner: Polio Day by Asis Kumar Sanyal, India Photograph: Asis Kumar Sanyal/CIWEM
Runner up: Spain Solar Energy by Markel Redondo and Greenpeace, Spain
The PS10 solar tower plant sits at Sanlucar la Mayor outside Seville, Spain. The solar tower plant, the first commercial solar tower in the world, by the Spanish company Solucar (Abengoa), can provide electricity for up to 6,000 homes Photograph: Markel Redondo/Greenpeace/CIWEM
Highly commended: Innovative Sewage Treatment Fountains to Aerate Effluent by Maria Hajitheodosi, England Photograph: Maria Hajitheodosi/CIWEM
Highly commended: Burn Fat Not Oil by Pornrutai Lohachal, England Photograph: CIWEM
