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harald hartmann

Location: berlin, Germany

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harald hartmann

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Meet the finalists

Marco Cremona

Sustainable Water Recy...

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Currently 3/5 Stars.

Craig White

Photosynthetic Archite...

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Currently 2.5/5 Stars.

Mathew Holloway

Artica – Eco Friendly...

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Currently 2.5/5 Stars.

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Hot discussions

Solar Power Generator

by amanda bal

That was interesting.

Kazakhstan tanneries

by Karim Jaroudi

any info about leather tanners in Kazak?

Should we be encouraging en...

by FishBowl Inafishbowl

Inafishbowl.com founder and entrepren...

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Shortlist

Marco Cremona

Sustainable Water Recy...

Rating:

Currently 3/5 Stars.

Craig White

Photosynthetic Archite...

Rating:

Currently 2.5/5 Stars.

Mario Rosato

AFADS: A low-cost trea...

Rating:

Currently 2.5/5 Stars.

Mark Mullen

Free commuter bikes, L...

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Currently 2.5/5 Stars.

Sameer Hajee

Clean lighting for imm...

Rating:

Currently 2.5/5 Stars.

Anne-Kathrin Kuhl...

Social Stock Exchanges...

Rating:

Currently 2.5/5 Stars.

Gilles Gallo

SOLAR-COOKER-BY-ID-COOK

Rating:

Currently 2.5/5 Stars.

Kresse Wesling

The Elvis & Kresse Org...

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Currently 2.5/5 Stars.

John Armstrong

A new idea for recover...

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Currently 2.5/5 Stars.

Mathew Holloway

Artica – Eco Friendly...

Rating:

Currently 2.5/5 Stars.

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Most popular entries

Marco Cremona

Sustainable Water Recy...

Rating:

Currently 3/5 Stars.

Sandeep Manohar N...

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