Organic produce may wear a green halo, but it doesn’t earn a clear climate advantage. Organic and conventional farming come out roughly even on greenhouse gas emissions and water pollution per kilogram of food, while organic needs far more land to grow the same harvest, as Vismay Basu reports for The New Indian Express.
The findings draw on a meta-analysis of 100 comparative studies, published in Communications Earth & Environment by Fatemeh Hashemi and colleagues. Researcher Hannah Ritchie turned the results into a scorecard at Our World in Data: organic wins on ecotoxicity and local biodiversity, conventional wins on land efficiency, and climate emissions and water pollution end in a draw.
The catch is yield. Relying on natural inputs and mechanical weed control, organic farms needed a median of 64 percent more land to produce the same amount of food. That matters, because conventional farming’s higher yields spare land that would otherwise be converted to agriculture.
SIGN UP
On emissions, neither system has the edge. Making synthetic fertilizer is energy-intensive, and it releases nitrous oxide once applied. But organic farming’s manure, compost and cover crops release nitrous oxide too, while demanding more land and fuel-hungry tillage.
Either way, the organic-versus-conventional gap, typically 5 to 50 percent, is dwarfed by what ends up on the plate. A kilogram of beef from a beef herd generates nearly 100 kilograms of greenhouse gas equivalents; a kilogram of peas, less than one.
Read the original article here
