Consider the following statements regarding the Carbon Border Adjustment Mechanism (CBAM):

1.It is a global environmental policy established by the United Nations Framework Convention on Climate Change (UNFCCC) to regulate international trade.

2.Its primary objective is to prevent "carbon leakage" by ensuring that imported goods are subject to the same carbon costs as domestic products.

3.The initial implementation of the mechanism specifically targets highly carbon-intensive sectors such as cement, iron and steel, aluminium, and fertilizers.

How many of the statements given above are correct?