第一句有多处错误。改为：

It is of urgency to appeal to those who are living in the wealthy and advanced countries to donate money to poor people.

【翻译】呼吁那些生活在富裕和发达国家的人向穷人捐款是当务之急。

1. 动词用法：appeal to sb. to do sth.

If you appeal to someone to do something, you make a serious and urgent request to them. 呼吁

He appealed to voters to go to the polls tomorrow.

他呼吁选民们明天去投票站。

2. 划线部分为定语从句。

第二句语法正确。

There will be a stadium where an outdoor court was.

【翻译】在原来是露天球场的地方，将有（建）一座体育场。