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2005.11.16

世界の森林減少は毎年730万ヘクタール!

Yahoo!NEWSより「世界の森林面積減少が鈍化 中国の植林でアジアは増加」(共同通信)

世界の森林の総面積は2000年以降、日本の本州の約3分の1に当たる約730万ヘクタールが毎年減少し、破壊は依然として深刻だが、植林や自然の生育により1990年代に比べ減少ペースは鈍化したとの報告書を、国連食糧農業機関(FAO)が14日発表した。
0511161
国連食糧農業機関(FAO)が5年間の調査結果をまとめた「グローバル・フォレスト・リソーシズ・アセスメント」が発表されました。

この報告書によれば、2000─2005年の間に森林は年率730万ヘクタールの割合で減少しています。これはほぼパナマの大きさに相当するとのこと。ただ、1990─2000年までの年率約890万ヘクタールの減少に比べると、減少の速度は鈍っているようです。

しかし減少が止まったわけではなく、報告書では「森林破壊は、警戒すべき速度で進行している」と警告しています。

減少が鈍った理由は植林活動と自然の森林拡大によるものだとのこと。

この5年間に森林減少が最も深刻だった地域は南米で、毎年430万ヘクタールが減少。次はアフリカで400万ヘクタール減。オセアニアと北・中米も30万ヘクタール以上減りました。

一方アジアは中国の大規模植林が功を奏し増加に転じたとのことです。

日本など約230カ国・地域のデータに基づいた報告書によると、05年の世界の森林面積は約40億ヘクタールで、陸地の約30%。
依然危険な水準であることは間違いありません。

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