This is the same product listed and described here:
Environmental Science Unit: POPULATION.
but is the PowerPoint Only version of the product.
The buyer should be aware that while the bulk of the lesson content is intact, some reformatting was necessary, not all internal links will work, and not all interactive portions will function as intended.
The only major difference between this product and the orginal is that the lessons in this product are presented by powerpoint instead of smart notebook. All blockplans and handouts are still Word based.
Please consider the original smart notebook based product and using/learning smart notebook (which your school or district may already have available for you) before considering this alternative product.