In fact, the process of climate change does not respect political borders, nor does it respect the social status of human beings, rich or poor, small or large, and this is what we call (global challenges), which require the solidarity of the whole world.

Clim

ate change is a source of concern as a result of the unprecedented magnitude of changes occurring in the world, and reports indicate that humanity is responsible for climate change, as it leads to destabilizing environmental and social conditions around the world, and as a result climate change has negatively affected the natural and cultural heritage owned by the world The issue of the effects of climate change on the World Heritage has received great attention at the present time to reduce the negative impact of climate change.

The research deals with an experimental and applied study of the use of the lipase enzyme loaded on pure Wacker OH and Nano-silica in cleaning the dirt resulting from climatic changes and strengthening the wall reliefs made of limestone.