Final answer:
Unilateral actions by a single country to reduce emissions do not effectively solve global environmental issues such as global warming and biodiversity loss, as these are international concerns that require cooperative efforts.
Step-by-step explanation:
The direct answer to the question is No, unilateral action to reduce emissions by one country does not lead to the same effect in other countries. These environmental problems, such as global warming and the loss of biodiversity, are international externalities and cannot be effectively addressed by individual nations acting in isolation. Issues like global warming require the cooperation of all nations because emissions in one area can affect the entire planet. Similarly, protecting biodiversity is a global issue that transcends borders, and thus collective action is necessary. Unilateral actions can be counterproductive if they lead to other countries exploiting lowered commodity prices to consume more, hence negating the efforts of the proactive country.