Complex sentence: Among these is the goal, that Copenhagen by 2015 has become the Eco-Metropole of the world, i.e. that it will be justifiably famous as the capital in the world with the best urban environment.
Split into simpler sentences: Among these is the goal, that Copenhagen by 2015 has become the Eco-Metropole of the world. In 2015 Copenhagen will be justifiably famous as the capital in the world with the best urban environment.