Thomas Karl/Science
Cov koom haum cog ntoo hauv ReLeaf Network tseem ceeb toom rau pej xeem tias peb yuav tsum txo cov pa phem thiab cov pa phem hauv tsev cog khoom. Tab sis cov nroj tsuag twb ua lawv feem. Kev tshawb fawb luam tawm online ua ntej lub hli no hauv Science qhia tau hais tias tsob ntoo deciduous nplooj, xws li cov los ntawm maple, aspen, thiab poplar, nqus cov pa phem ntau dua li qhov kev xav yav dhau los.
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