Every time i go into the house "Unabridged" it does this, and it makes me really mad because i love this house. It looks like humungous leaves. I tried deleting all the plants around my house and it didn't work. I also tried downloading a CC version of the house and it still did it. I moved to a different lot and it wasn't as bad but it still did it. I stopped playing for a long time but then recently started playing again. I created a whole new profile and family and it worked fine. I've been playing for a few hours, then all of a sudden out of no where, when i rotated my screen the leaves appeared again. They kinda sway/move across the screen or sometimes they'll just sit there. Its super annoying and makes me want to delete the game but I love playing. Please help...
Also I have tried deleting and reinstalling the game..

That looks like graphics artefacts to me. What are your Game Help:System Specs^wiki?

Hardware Overview:

Model Name: MacBook Air
Model Identifier: MacBookAir3,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.13 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBA31.0061.B01
SMC Version (system): 1.66f61
Serial Number (system): C2QFX016DJLQ
Hardware UUID: 89D9503F-6657-5E63-B8A5-61A746026E24


NVIDIA GeForce 320M:

Chipset Model: NVIDIA GeForce 320M
Type: GPU
Bus: PCI
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x08a3
Revision ID: 0x00a2
ROM Revision: 3571
Displays:
Color LCD:
Resolution: 1440 x 900
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Connection Type: DisplayPort
Display Connector:
Status: No Display Connected



If you need more information let me know(:

See if lowering your resolution to 1366x768 and lowering all the details to minimum helps. But you should know that the GT 320M you have isn't really a gaming graphics card. It may just not be able to keep up or it may be overheating.