The original agricultural wastes had captured CO2 from the air through the photosynthesis process;biochar is a low-tech way of sequestering carbon, effectively for ever.

• 燃烧前的农业废料已经通过光合作用从空气中吸收了二氧化碳，因此使用“生物碳”来封存碳并非高科技手段，但却永远有效。