ヨーロッパやアメリカ合衆国では、巨大ダム建設は1960年代にピークを迎えましたが、現在ではその環境的・社会的コストが大きすぎるとして解体・撤去されていっています。しかしながら、アジアやアフリカの発展途上国では今も何千という巨大ダム建設計画が進んでいます。欧米から学ぶべき教訓はなんなのか。またウォームアップで見たように、少ない設備投資で遠隔地に設置できる小水力発電も注目を集めています。その土地や自然環境にあった再生可能エネルギー（太陽光、風力、水力、地熱など）をうまく組み合わせる必要があります。東南アジアの大河メコン川流域では、大規模水力発電のダム開発計画が見直され、太陽光発電が伸びています。

次の語句に最も適切な定義や同義語を選んで記号で答えましょう。

viability (a) 地域

plant (b) 貯水池

incorporate (c) 合体させる、合併させる、組み入れる

region (d) 実行可能性

significantly (e) 壊滅的な

catastrophic (f) 重大な程度で

commission (g) 送電網システムにつながって稼働状態になる

reservoir (h) 工場や発電所などの工業系施設・設備

go online (i)  仕事を命じる

Reading Page:

https://learningenglish.voanews.com/a/solar-projects-increase-in-the-mekong-river-area/4340610.html

(1) According to Brian Eyler, which statement is untrue? 

(a) Major hydro-electric dams in Southeast Asia are probably not financially sustainable.

(b) Four countries in Southeast Asia have agreed to introduce solar and wind power on a large scale.

(c) Cambodia decided to incorporate more solar and wind power in January 2017.

(d) Cambodia changed its mind to establish the best mix of renewables, including nuclear power.

(2) According to Hyunjung Lee, which statement is true?

(a) Because of climate change, typhoons hit the region hard.

(b) The atmosphere in Southeast Asia has changed and now contains more CO2.

(c) Large-scale hydro-electric power plants have left negative impacts on the local communities.

(d) Serious droughts hit the region and dams dried up.

(3) According to the Mekong River Commission, which statement is true?

(a) Too many dams on the Mekong River broke down, but the good thing was that the fish could go up the stream now.

(b) More than 100 hydropower dams have been built on tributary rivers.

(c) It is difficult to build a dam on relatively flat land.

(d) Their study of the river ecology revealed that the dam constructions would seriously damage the habitats of the river creatures and the livelihood of those who depend on fishery.

(4) According to the IREA (International Renewable Energy Agency), which statement is true?

(a) Solar power will become cheaper than hydropower by 2020.

(b) The cost of solar power is now half of that of hydropower at the point of 2017.

(c) Asia is the fastest growing region of the world in terms of wave and tidal power generation.

(d) Hydropower has been declining, but ultra-small hydro-electric power generators are becoming popular in Asia.

(5) How can people of Cambodia solve the land issue that seemed to have hindered the introduction of large solar projects?

(a) By installing solar cells on the floaters on the reservoirs.

(b) By using the land where there used to be Sambor dam.

(c) By relocating 500,000 Cambodians and rendering their land vacant and available.

(d) By using some abandoned coal mines.

Video やReadingで紹介されている事象に対して、どのように思うか自分なりに考えて意見を発表してみよう。

1)日本語で意見を言ってみよう。

2) 英語で意見を聞いてみよう。

追加説明や例示がほしい時

Could you explain more about ----?

Can you give me an example?

What do you mean (by ~~~) ?

What happened?

When did this happen?

Where did this happen?

3) 英語で相手の問いに答えてみよう。

Discussion sample

A: Should the governments of developing countries increase solar and wind power projects rather than invest in fossil fuel power generation projects?

B: Well, I strongly believe that the developing countries should prioritize their own economic growth because ~~~~~~~.

C: My opinion is that so-called Green New Deal can still contribute to their economic growth without causing much environmental cost, or even with environmental recovery. For example, ~~~~~~~~.